CAT4101 Datasheet, PDF (5/10 Pages) ON Semiconductor – 1 A Constant-Current LED Driver with PWM Dimming

CAT4101
TYPICAL PERFORMANCE CHARACTERISTICS
(V_IN = 5 V, V_CC = 5 V, V_F = 3.5 V, I_LED = 1 A (1 LED), C_IN = 1 mF, T_AMB = 25°C unless otherwise specified.)
1.30
1.30
1.25
1.25
1.20
1.20
1.15
1.15
1.10
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 9. RSET Pin Voltage vs. VIN Voltage
1.10
−40
0
40
80
120
TEMPERATURE (°C)
Figure 10. RSET Pin Voltage vs. Temperature
1.2
1.0
0.8
0.6
0.4
0.2
0
0
1
2
3
4
5
RSET (kW)
Figure 11. LED Current vs. RSET Resistor
Figure 12. PWM 200 Hz, 1% Duty Cycle
100
1.4
10
1
100 Hz
0.1
1 kHz 5 kHz 50 kHz
0.1
1
10
100
DUTY CYCLE (%)
Figure 13. LED Current vs. PWM Duty Cycle
1.2
−40°C
1.0
25°C
0.8
85°C
0.6
0.4
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 14. EN/PWM Threshold vs. VIN
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